CN102522582A - Shutdown purging system and purging method for vehicle-mounted fuel cell power generation system - Google Patents
Shutdown purging system and purging method for vehicle-mounted fuel cell power generation system Download PDFInfo
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- CN102522582A CN102522582A CN2011104492247A CN201110449224A CN102522582A CN 102522582 A CN102522582 A CN 102522582A CN 2011104492247 A CN2011104492247 A CN 2011104492247A CN 201110449224 A CN201110449224 A CN 201110449224A CN 102522582 A CN102522582 A CN 102522582A
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- B60—VEHICLES IN GENERAL
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- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
- B60L1/003—Supplying electric power to auxiliary equipment of vehicles to auxiliary motors, e.g. for pumps, compressors
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- B60—VEHICLES IN GENERAL
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- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
- B60L1/02—Supplying electric power to auxiliary equipment of vehicles to electric heating circuits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
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- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
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- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0053—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to fuel cells
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- B60L58/32—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load
- B60L58/33—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load by cooling
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- B60—VEHICLES IN GENERAL
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- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
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- B60L58/32—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load
- B60L58/34—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load by heating
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- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/40—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and fuel cells
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- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2220/00—Electrical machine types; Structures or applications thereof
- B60L2220/40—Electrical machine applications
- B60L2220/44—Wheel Hub motors, i.e. integrated in the wheel hub
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- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/36—Temperature of vehicle components or parts
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- B60L2240/42—Drive Train control parameters related to electric machines
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- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
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- B60L2240/42—Drive Train control parameters related to electric machines
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- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a shutdown purging system and a purging method for a vehicle-mounted fuel cell power generation system. The system comprises a fuel cell, a vehicle control unit, a fuel cell controller, a power output relay, an air pump, a hydrogen tail exhaust electromagnetic valve, a fuel cell temperature acquisition device and an environmental temperature acquisition device. A control method comprises the step that the fuel cell controller controls the rotating speed of the air pump, the exhaust period of the hydrogen tail exhaust electromagnetic valve and the purging time in the shutdown process according to the temperature of the fuel cell and the environmental temperature. The shutdown purging system and the purging method for the vehicle-mounted fuel cell power generation system have the beneficial effects that the purging process depends on power generated by the fuel cell power generation system and the feed of a storage battery, which is caused by shutdown purging, can be prevented; and the purging is not limited by time, is determined according to the fuel cell and the environment state and is completely carried out by liquid water.
Description
Technical field
The invention belongs to the Proton Exchange Membrane Fuel Cells field, relate in particular to the shutdown of Proton Exchange Membrane Fuel Cells electricity generation system and purge control system and purge control method.
Technical background
In the prior art; It all is that the mode of taking to fix is carried out that the vehicle-mounted fuel cell power generation system shutdown purges; Receive after the shutdown command of car load that the fuel shutoff battery relay purges for the active force power supply with the storage battery; Purge and adopt fixed method, the air pump purge rates is fixed, tail valve regular discharge.The deficiency of prior art is: 1, since under different environment temperature and the different fuel battery temperature the liquid water yield of fuel battery inside be discrepant, can control purges with fuel battery temperature according to the different environment temperature, reach best purging effect; 2, purging is under the fuel cell shutdown state, to carry out, and needing provides purging power with accessory power supply, and the electric weight of storage battery is limited; Generally the most very much not allow above 2 minutes; If purge time is long, the accessory power supply electric weight can't satisfy consumption requirements, the feed phenomenon will occur.
Summary of the invention
The object of the present invention is to provide a kind of shutdown that is used for vehicle-mounted fuel cell power generation system to purge control system and control method; When strengthening shutdown aqueous water in the fuel cell generation is purged; Air speed when confirming shutdown according to ambient temperature and fuel battery temperature is arranged the cycle with the hydrogen tail; The electric weight that sends with fuel cell itself satisfies the purging requirement, without storage battery power supply, realizes that self generating supplies self to purge and uses.
The object of the invention is realized through following technical scheme:
A kind of shutdown purging system of vehicle-mounted fuel cell power generation system; Mainly comprise fuel cell, entire car controller, fuel cell controller, power output relay, air pump and hydrogen tail row electromagnetically operated valve; Entire car controller and fuel cell controller are through the data wire communication; Fuel cell is outwards exported electric weight through the power output relay; Fuel cell controller is through the operation of data wire control fuel cell; It is characterized in that the said shutdown purging system that is used for vehicle-mounted fuel cell power generation system also comprises fuel battery temperature harvester and temperature collection device, fuel battery temperature harvester and temperature collection device transmit temperature data through data wire to fuel cell controller, and fuel cell controller purges when shutting down according to the temperature data control that obtains.
The blowing method of the shutdown purging system of a kind of vehicle-mounted fuel cell power generation system of the present invention; With air pump fuel cell is purged when comprising the car load shutdown; It is characterized in that said blowing method also comprises preparatory shutdown process, said preparatory shutdown process may further comprise the steps:
1) after entire car controller sends the car load off signal; Fuel cell controller sends preparatory shutdown command; Make the fuel cell motive force output relay keep attracting state; Keep air pump operation and the operation of hydrogen tail row electromagnetically operated valve, the air of control fuel cell and the flow of hydrogen are in fuel cell and satisfy the output state that purges power demand;
2) temperature data of fuel cell temperature collecting device and the collection of temperature collection device purges fuel cell with corresponding purge gas speed, tail row's electromagnetically operated valve release and purging duration;
3) after purging was accomplished, fuel cell controller returned preparatory shutdown to entire car controller and accomplishes signal, and fuel cell controller fuel shutoff battery power output relay makes the fuel cell shutdown, and other accessory power supply of entire car controller cut-out is simultaneously accomplished shutdown.
The blowing method of the shutdown purging system of a kind of vehicle-mounted fuel cell power generation system according to the invention; The temperature data that it is characterized in that said fuel cell temperature collecting device and the collection of temperature collection device is with corresponding purge gas speed, tail row's electromagnetically operated valve release and purge duration and fuel cell is purged be: fuel battery temperature is divided into m temperature range; Ambient temperature is divided into n temperature range; M and n are 1～8 integer; The corresponding temperature range of each temperature range; The temperature range n at the temperature range m at the temperature place that the fuel cell temperature collecting device is gathered and the temperature place that the temperature collection device is gathered confirms purge gas speed, the tail row's electromagnetically operated valve release under this m and the n combination and purges duration that the low then purge gas speed of fuel battery temperature and ambient temperature is high; Tail row's electromagnetically operated valve release is short, and the purging duration is long.Purge gas speed is by the rotating speed control of air pump.
Principle of the present invention is: under varying environment temperature and different fuel battery temperature; The amount of the liquid condensation water that the reaction in the fuel cell generates is different; Under this varying environment temperature and different fuel battery temperature, speed, hydrogen tail row electromagnetically operated valve discharging cycle and the purging duration of the different liquid water yield control purge gas in the fuel cell.Simultaneously, make fuel cell be in the small-power generating state, only be provided for the electric power that purges, because power is less, the water of generation is less, and under big air mass flow, the water of generation is easy to purged only.General requirement of purging flow velocity to the chemical process pipeline is not less than 20 meter per seconds in theory, and fuel cell of the present invention is equivalent to process pipelines, requires it is purged according to chemical pipeline, and high flow rate, high pressure can be accelerated flowing of material.Rotating speed through regulating air pump improves purging pressure and flow in the fuel cell, and then improves the purging flow velocity, reaches the purpose of blowing most air reaction interface aqueous water; The folding of adjusting hydrogen tail row electromagnetically operated valve, H-H reaction interface in the fuel cell is discharged in pulse, because the concentration difference effect from the air reaction interface, is permeated the aqueous water of coming.
The invention has the beneficial effects as follows:
1, provide the mode of enough big tolerance to come purging for fuel cell with little power output, fuel cell water generation reaction under this power also will be blown off;
2, purge is not used the electric weight of storage battery, the electric power that relies on fuel cell generation itself to send, and the required electric weight of supplying purging can effectively prevent to purge the accumulator feeding that causes because of shutdown;
3, the present invention purges and does not receive time restriction, and fuel cell and ambient condition are confirmed blowing method, and it is more thorough that aqueous water purges.
Description of drawings
Drawings attached six width of cloth of the present invention, wherein:
Fig. 1 is a vehicle-mounted fuel cell power generation system shutdown purging system sketch map of the present invention;
Fig. 2 purges the control method schematic flow sheet for vehicle-mounted fuel cell power generation system shutdown purging system of the present invention;
Fig. 3 purges the control method schematic flow sheet for prior art vehicle-mounted fuel cell power generation system shutdown purging system.
Fig. 4 is that the shutdown purging system of embodiment purges the control method schematic flow sheet;
Fig. 5 is a result of the test curve chart of the present invention;
Fig. 6 is result of the test of the present invention and prior art result of the test curve comparison diagram.
In the accompanying drawing, 1, entire car controller, 2, fuel cell controller, 3, the power output relay; 4, temperature collection device, 5, the fuel battery temperature harvester, 6, air pump, 7, hydrogen tail row electromagnetically operated valve; 8, storage battery, 9, current transfer device, 10, the drive hub motor, 11, fuel cell; 12, accessory power supply, 13, tail row hygrometer, 14, radiator
101, the relative humidity of the inventive method changes experimental curve diagram in time, and experiment condition is: ambient temperature T≤0 ℃, and battery temperature t≤40 ℃,
202, the relative humidity of the inventive method changes experimental curve diagram in time, and experiment condition is: ambient temperature T≤0 ℃, and battery temperature t＞40 ℃,
303, the relative humidity of the inventive method changes experimental curve diagram in time, and experiment condition is: 0 ℃＜T of ambient temperature≤10 ℃, and battery temperature t≤40 ℃,
404, the relative humidity of the inventive method changes experimental curve diagram in time, and experiment condition is: 0 ℃＜T of ambient temperature≤10 ℃, and battery temperature t＞40 ℃,
505, the relative humidity of the inventive method changes experimental curve diagram in time, and experiment condition is: 10 ℃＜T of ambient temperature≤20 ℃, and battery temperature t≤40 ℃,
606, the relative humidity of the inventive method changes experimental curve diagram in time, and experiment condition is: 10 ℃＜T of ambient temperature≤20 ℃, and battery temperature t＞40 ℃,
707, the relative humidity of the inventive method changes experimental curve diagram in time, and experiment condition is: ambient temperature T＞20 ℃,
110, the relative humidity that purged 1.5 minutes of prior art changes experimental curve diagram in time, and experiment condition is:, ambient temperature T≤0 ℃, battery temperature t≤40 ℃,
220, the relative humidity that purged 1.5 minutes of prior art changes experimental curve diagram in time, and experiment condition is: ambient temperature T≤0 ℃, and battery temperature t＞40 ℃,
330, the relative humidity that purged 1.5 minutes of prior art changes experimental curve diagram in time, and experiment condition is: 0 ℃＜T of ambient temperature≤10 ℃, and battery temperature t≤40 ℃,
440, the relative humidity that purged 1.5 minutes of prior art changes experimental curve diagram in time, and experiment condition is: 0 ℃＜T of ambient temperature≤10 ℃, and battery temperature t＞40 ℃,
550, the relative humidity that purged 1.5 minutes of prior art changes experimental curve diagram in time, and experiment condition is: 10 ℃＜T of ambient temperature≤20 ℃, and battery temperature t≤40 ℃,
660, the relative humidity that purged 1.5 minutes of prior art changes experimental curve diagram in time, and experiment condition is: 10 ℃＜T of ambient temperature≤20 ℃, and battery temperature t＞40 ℃,
770, the relative humidity that purged 1.5 minutes of prior art changes experimental curve diagram in time, and experiment condition is: ambient temperature T＞20 ℃.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
The shutdown purging system mainly comprises fuel cell, entire car controller, fuel cell controller, power output relay, air pump, hydrogen tail row electromagnetically operated valve, fuel battery temperature harvester and temperature collection device; Entire car controller and fuel cell controller are through the data wire communication; Fuel cell is outwards exported electric weight through the power output relay; Fuel cell controller is through the operation of data wire control fuel cell; Fuel battery temperature harvester and temperature collection device transmit temperature data through data wire to fuel cell controller, and fuel cell controller purges when shutting down according to the temperature data control that obtains.
Blowing method comprises the preparatory shutdown procedures in car load when shutdown and with air pump fuel cell is purged that shutdown procedures may further comprise the steps in advance:
1) after entire car controller sends the car load off signal; Fuel cell controller sends preparatory shutdown command, makes the fuel cell motive force output relay keep attracting state, and disconnection power output relay is connected with current transfer device DC/DC (9); Keep being connected of air pump and hydrogen tail row's electromagnetically operated valve; The air of control fuel cell and the flow of hydrogen make fuel cell be in the small-power output state, satisfy the required electric weight of purging for fuel cell;
2) temperature data of fuel cell temperature collecting device and temperature collection device collection purges fuel cell with the purging duration with corresponding purge gas speed, tail row's electromagnetically operated valve (7) release and is: fuel battery temperature is divided into m temperature range; Ambient temperature is divided into n temperature range; M and n are 1～8 integer; The corresponding temperature range of each temperature range; The temperature range n at the temperature range m at the temperature place that the fuel cell temperature collecting device is gathered and the temperature place that the temperature collection device is gathered confirms purge gas speed, tail row's electromagnetically operated valve (7) release under this m and the n combination and purges duration.
3) after purging was accomplished, fuel cell controller returned preparatory shutdown to entire car controller and accomplishes signal, and fuel cell controller fuel shutoff battery power output relay makes the fuel cell shutdown, and other accessory power supply of entire car controller cut-out is simultaneously accomplished shutdown.
Embodiment is an object with vehicle-mounted specified 40kW fuel cell generation, and the storage battery that adopts 8AH is as starting power supply, and air pump maximum (top) speed 3600 changes maximum stream flow 270m
3/ h, hydrogen tail row electromagnetically operated valve CV value 1.1.Whole system is inserted in the environment storehouse and under the different environment temperature, is moved, and ambient humidity is controlled at 40%.Simulate vehicle-mounted at the uniform velocity operating mode and load, whenever gathered fuel cell humidity delta data at a distance from one minute.The shutdown purge step is following:
1. entire car controller 1 sends off signal information;
2. fuel cell controller 2 starts preparatory shutdown command according to the car load off signal, promptly after the shutdown command of receiving car load, does not carry out shutdown command at once, but carries out preparatory shutdown command, gets into preparatory off-mode, carries out shutdown purging program;
3. keep hydrogen air inlet electromagnetically operated valve to open; Keep power output relay 3 to be in attracting state; This state is not in order to make drive motors 10 work through current transfer device DC/DC9; But for the electric weight of battery consumption 8 not, the electric power that the small-power electric weight that itself is sent by fuel cell 11 is provided for purging.Because power is less, the water of generation is less, under very big air mass flow, is easy to blow off, and whole process is not had much affect.
4. measure current vehicle-mounted fuel cell power generation system ambient temperature by temperature collection device 4; Ambient temperature information is introduced the fuel cell generation shutdown to purge in the control; Ambient temperature is divided into four temperature ranges, is respectively: the temperature of n1 temperature range is T≤0 ℃, and the temperature T of n2 temperature range is 0 ℃＜T≤10 ℃; The temperature T of n3 temperature range is 10 ℃＜T≤20 ℃, and the temperature T of n4 temperature range is T＞20 ℃;
5. measure current on-vehicle fuel temperature by fuel battery temperature harvester 5, the on-vehicle fuel temperature is divided into two temperature ranges, be respectively: the temperature T of m1 temperature range is T≤40 ℃, and the temperature T of m2 temperature range is T＞40 ℃;
6. according to the interval at the said ambient temperature place that measures and the combination of the temperature range at the fuel battery temperature place that measures, confirm the folding cycle of the rotating speed and the hydrogen tail row electromagnetically operated valve 7 of air pump 6; The folding cycle of the rotating speed of concrete assembled state and air pump 6 and hydrogen tail row electromagnetically operated valve 7 is following:
1) environment storehouse ambient temperature is-5 ℃, is in the n1 interval, and ambient humidity is controlled at 40%, loads the 10kW drive motors; Because fuel cell is connected with radiator 14, ambient temperature is lower, and it is soaring that fuel battery temperature is difficult to; Through operation in 10 minutes, fuel battery temperature was 5 ℃, is in the m1 interval.The combination of this m1 and n1, ambient temperature are very low, and fuel battery temperature is also lower; The steam major part of fuel battery inside has been condensed into aqueous water, causes damage for preventing that low temperature from freezing to fuel cell, and this ambient temperature and fuel battery temperature combination given air pump 6 rotating speeds down are 3000 revolutions per seconds; Through converting to such an extent that fuel battery air tail current drainage speed is 28 meter per seconds; Under high flow capacity, the high pressure, air brings than higher heat, makes vaporous water be not easy to condense; Also make the liquid water vaporizes that has settled down, blow out fuel cell more easily.Hydrogen tail row's 2 seconds 7 releases of electromagnetically operated valve, to open and closed 1 second in 1 second, the water that is penetrated into the H-H reaction interface by PEM helps the discharge of water under high frequency time pulse pressure drop.Purge after 15 minutes, the humidity that tail row hygrometer 13 is measured drops to 43%, near ambient humidity 40%, thinks to purge fully that test result is seen curve 101 among Fig. 5.
Environment storehouse ambient temperature and ambient humidity remain unchanged, and drive motors load is increased to 20KW, and through operation in 10 minutes, fuel battery temperature rose to 41 ℃, is in the m2 interval.Ambient temperature is very low, and fuel battery temperature is higher, and the aqueous water that this moment, fuel battery inside condensed is less, and 3000 revolutions per seconds of given air pump 6 rotating speeds, are opened and closed 1 second in 1 second at tail row's 2 seconds 7 releases of electromagnetically operated valve.Because water purges after 10 minutes with the ratio height that gaseous state exists, the humidity that tail row hygrometer 13 is measured has dropped to 41%, and water base in the fuel cell purges totally, and test result is seen curve 202 among Fig. 5.
2) environment storehouse ambient temperature is 5 ℃, is in the n2 interval, and ambient humidity is controlled at 40%; Load the 10KW drive motors, because fuel cell is connected with radiator 14, ambient temperature is lower; It is soaring that fuel battery temperature is difficult to, and through operation in 10 minutes, fuel battery temperature reached 23 ℃; Fuel battery temperature is also lower, is in the m1 interval.Under this m2 and the n2 combination condition, the internal steam major part has been condensed into aqueous water, needs higher flow velocity to purge; Because ambient temperature is not lower than the freezing point of water,, the PEM dehydration is done partially for preventing that excessive tolerance from purging so can not bring damage to fuel cell; Avoid purging the corrosion that does not totally cause again, 2500 revolutions per seconds of given air pump 6 rotating speeds are through converting to such an extent that fuel battery air tail current drainage speed reaches 26 meter per seconds; Tail row's 3 seconds 7 releases of electromagnetically operated valve; Open and closed 2 seconds in 1 second, the water that the H-H reaction contacting permeation is come under this ambient temperature is less, discharges easily.Purge the humidity that tail row hygrometer 13 is measured after 10 minutes and dropped to 43%, test result is seen curve 303 among Fig. 5.
Environment storehouse ambient temperature and ambient humidity remain unchanged, and drive motors load is increased to 20KW, and through operation in 10 minutes, fuel battery temperature rose to 48 ℃, is in the m2 interval.2500 revolutions per seconds of given air pump 6 rotating speeds, are opened and were closed 2 seconds in 1 second at tail row's 3 seconds 7 releases of electromagnetically operated valve.Purge the humidity that tail row hygrometer 13 is measured after 6 minutes and dropped to 42%, test result is seen curve 404 among Fig. 5.
3) environment storehouse ambient temperature is 15 ℃, is in the n2 interval, and ambient humidity is controlled at 40%, loads the 10KW drive motors; Because fuel cell is connected with radiator 14, ambient temperature is lower, and it is soaring that fuel battery temperature is difficult to; Through operation in 10 minutes, fuel battery temperature reached 38 ℃, is in the m1 interval.Ambient temperature is higher, and the water aqueous water content in the fuel cell is not high, and 2000 revolutions per seconds of given air pump 6 rotating speeds record fuel battery air tail current drainage speed and reach 23 meter per seconds, tail row's 4 seconds 7 releases of electromagnetically operated valve, opens and closes 3 seconds in 1 second.Purge the humidity that tail row hygrometer 13 is measured after 6 minutes and dropped to 44%, test result is seen curve 505 among Fig. 5.
Environment storehouse ambient temperature and ambient humidity remain unchanged, and drive motors load is increased to 20KW, and through operation in 10 minutes, fuel battery temperature rose to 55 ℃ and is in the m2 interval.At this moment water is many in the fuel cell exists with gaseous form, and 2000 revolutions per seconds of given air pump 6 rotating speeds, are opened and closed 3 seconds in 1 second at tail row's 4 seconds 7 releases of electromagnetically operated valve.Purge the humidity that tail row hygrometer 13 is measured after 4 minutes and dropped to 43%, test result is seen curve 606 among Fig. 5.
4) environment storehouse ambient temperature is 25 ℃, is in the n2 interval, and ambient humidity is controlled at 40%, loads the 10KW drive motors, and ambient temperature is high, and fuel battery temperature rises very fast, and through operation in 10 minutes, fuel battery temperature reached 61 ℃, is in the m1 interval.Because ambient temperature is very high; Internal water all exists with gaseous state, and then little tolerance is enough to take away most steam, does not condense and can not produce; 1500 revolutions per seconds of given air pump 6 rotating speeds; Record fuel battery air tail current drainage speed and reach 21 meter per seconds, the H-H reaction interfacial water that infiltration is come also exists with gaseous state, and a small amount of pulse can be discharged.Tail row's 5 seconds 7 releases of electromagnetically operated valve, open and closed 4 seconds in 1 second.Purge the humidity that tail row hygrometer 13 is measured after 2 minutes and dropped to 44%, test result is seen curve 707 among Fig. 5.
7. after above-mentioned blowing method is finished, return the shutdown sign indicating number, send to entire car controller 1 simultaneously.
8. after the shutdown sign indicating number returns, entire car controller 1 control fuel shutoff battery power output relay 3, all fuel cell system parts quit work, and entire car controller 1 cuts off all other accessory power supply 12 supplies, shutdown according to the shutdown sign indicating number.
Done contrast test with art methods, because the restriction of accumulator electric-quantity only allows to purge 1.5 minutes under the different temperatures, air pump 6 rotating speeds 3000 change, and tail row's 5 seconds 7 releases of electromagnetically operated valve, open the 1 pulse per second (PPS) formula of closing in 1 second and purge.Test result is only when ambient temperature is high, approaches to purge fully, and concrete test result is seen correlation curve Fig. 6 of experimental result of the present invention and prior art.
Claims (5)
1. the shutdown purging system of a vehicle-mounted fuel cell power generation system; Mainly comprise fuel cell (11), entire car controller (1), fuel cell controller (2), power output relay (3), air pump (6) and hydrogen tail row electromagnetically operated valve (7); Entire car controller (1) passes through the data wire communication with fuel cell controller (2); Fuel cell (11) is outwards exported electric weight through power output relay (3); Fuel cell controller (1) is through the operation of data wire control fuel cell (11); The shutdown purging system that it is characterized in that said vehicle-mounted fuel cell power generation system also comprises fuel battery temperature harvester (5) and temperature collection device (4); To fuel cell controller (2) transmission temperature data, fuel cell controller (2) purges according to the temperature data control shutdown that obtains through data wire for fuel battery temperature harvester (5) and temperature collection device (4).
2. the blowing method of the shutdown purging system of the described a kind of vehicle-mounted fuel cell power generation system of claim 1; With air pump (6) fuel cell (11) is purged when comprising the car load shutdown; It is characterized in that said blowing method also comprises preparatory shutdown process, said preparatory shutdown process may further comprise the steps:
1) after entire car controller (1) sends the car load off signal; Fuel cell controller (2) sends preparatory shutdown command; Make fuel cell motive force output relay (3) keep attracting state; Keep air pump (6) operation and hydrogen tail row's electromagnetically operated valve (7) operation, the air of control fuel cell (11) and the flow of hydrogen are in fuel cell (11) and satisfy the output state that purges power demand;
2) temperature data of fuel cell temperature collecting device (5) and temperature collection device (4) collection purges fuel cell with corresponding purge gas speed, tail row's electromagnetically operated valve release and purging duration;
3) after purging is accomplished; Fuel cell controller (2) returns preparatory shutdown to entire car controller (1) and accomplishes signal, and fuel cell controller (2) fuel shutoff battery power output relay (3) makes the fuel cell shutdown; Entire car controller (1) cuts off other accessory power supply simultaneously, accomplishes shutdown.
3. according to the blowing method of the shutdown purging system of the said a kind of vehicle-mounted fuel cell power generation system of claim 2; It is characterized in that temperature data that said fuel cell temperature collecting device (5) and temperature collection device (4) are gathered purges fuel cell (11) with corresponding purge gas speed, tail row's electromagnetically operated valve release and purging duration is: fuel battery temperature is divided into m temperature range; Ambient temperature is divided into n temperature range; M and n are 1～8 integer; The corresponding temperature range of each temperature range; The temperature range n at the temperature range m at the temperature place that fuel cell temperature collecting device (5) is gathered and the temperature place that temperature collection device (4) is gathered confirms purge gas speed, the tail row's electromagnetically operated valve release under this m and the n combination and purges duration.
4. according to the blowing method of the shutdown purging system of the said a kind of vehicle-mounted fuel cell power generation system of claim 2; It is characterized in that temperature data that said fuel cell temperature collecting device (5) and temperature collection device (4) gather is with corresponding purge gas speed, tail row's electromagnetically operated valve release with purge duration and fuel cell is purged be: fuel battery temperature and ambient temperature are hanged down then purge gas speed height; Tail row's electromagnetically operated valve release is short, and the purging duration is long.
5. according to the blowing method of the shutdown purging system of the said a kind of vehicle-mounted fuel cell power generation system of claim 4, it is characterized in that of the rotating speed control of said purge gas speed by air pump (6).
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